Phosphorus discharges at Yara Finlands Uusikaupunki site Seppo - - PowerPoint PPT Presentation

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Nov 23, 2023 259 likes •376 views

Phosphorus discharges at Yara Finlands Uusikaupunki site Seppo Knuuttila SYKE 30 October 2014 HELCOM PRESSURE Ph Phos osph phog ogyp ypsu sum stacks stacks in in th the e ca catc tchme hment nt area area of the of the Balt

SLIDE 1

Phosphorus discharges at Yara Finland’s Uusikaupunki site

Seppo Knuuttila SYKE

30 October 2014 HELCOM PRESSURE

SLIDE 2

Ph Phos

phog

ypsu sum stacks stacks in in th the e ca catc tchme hment nt area area of the

f the Balt

Baltic ic Sea Sea

Yara AB, Köpingsfabriken Yara AB, Gipsön Yara Suomi, Uudenkaupungin tehtaat YARA Suomi, Oy, Siilinjärvi EuroChem, Phoshorit EuroChem, Lifosa Zakłady Chemiczne "POLICE" S.A. Gdańskie Zakłady Nawozów Fosforowych "Fosfory" Sp. z o.o.

SLIDE 3

Ph Phos

phog

ypsu sum stacks stacks in in th the e ca catc tchme hment nt area area of the

f the Balt

Baltic ic Sea Sea

88,5 58 50 50 16,6 5,4 2,3 10 20 30 40 50 60 70 80 90 100 Police Poland Fosforit Russia Lifosa Lithuania Yara Siilinjärvi Finland Fosfory Poland Yara Uusikaupunki Finland Yara Landskrona Sweden

Amount of phosphogypsum waste as millions of tons in 2012

Foto: Yara Finland

SLIDE 4

Foto: Yara Finland

Ya Yara ra Fin Finlan land, d, Uu Uusika sikaup upun unki ki site site

Phosphoric acid production started

in1965

At first the gypsum was silted to sea

water (common procedure in Europe at that time)

Phosphorus load into the Bothnian

Sea up to 200 tons/year between late 1960s and early 1980s – largest single source of P to the Baltic Sea from Finland

Phosphoric acid plant was shut

down in 1990

Phosphogypsum stack consists of

approximately 5 Mt of gypsum including 3800 tons of phosphorus

SLIDE 5

Wat Water er protecti protection

n mea

measu sure res in 19 in 1990 90s

Geolock was installed in two

places in bund wall in 1990 (400 m, total length of bund wall is 1000 m)

The gypsum surface area

was covered with moraine (average thickness 30 cm) in 1993

The amount of phosphorus

leakage into the sea through the bund wall gradually decreased to 10 kg/d (about 4 tons/year)

Source: Pöyry Finland 2011

SLIDE 6

Ph Phos

phor

us concentrati concentrations

ns at

at th the e se sea a in f in fro ront nt of the

f the bu

bund nd wall wall

Source: Pöyry Finland 2011

SLIDE 7

Ad Addit dition ional al mea measu sure res in 20 in 2012 12-2013 2013

According to environmental

permit given to Yara in December 2008 the site was

bliged to restrict the discharge

from the phosphogypsym area as low level as possible

Permit for building an insulation

wall in the gypsum bund wall to prevent phosphorus leaking into the Bothnian Sea was given in December 2011

The construction of the

insulation wall was completed in the end of 2013 The aim of additional insulation is to reduce phosphorus leakage by 95 percent from the preceding level (4 tons/year).

Foto: Yara Finland

SLIDE 8

Cr Cros

ss-se

sect ction ion of the

f the bund

bund wall wall with with ad addit dition ional al insu insulat lation ion

Source: Yara Finland

Additional insulation Bund wall Sea

SLIDE 9

Monito Monitoring ring site sites s at at th the e se sea a in f in fro ront nt of

th the e bu bund nd wall at wall at Yara’s Uus Uusika ikaup upun unki ki site site

The phosphorus concentrations

in the sea in front of the bund wall are monitored four times a year at 18 sites locating at 5 meters distance from the bund wall and 4 sites at 20 m and 100 meters distance from the bund wall

Groundwater level is monitored

through 7 pipes in gypsum area. Surface water level of the insulation ditch between the sea and gypsum area is monitored continuously, water samples are taken weekly

Additionally water quality in the

near-by sea area is monitored in 19 sites 8 times a year

Source: Pöyry Finland 2011

SLIDE 10

Cur Curre rent nt situ situat ation ion

Preliminary results suggest that the leakage has decreased in

consequence of construction of insulation wall; the target level has not yet been achieved

Local supervisory authority has called for monitoring of

phosphorus concentrations on both sides of the insulation wall, water balance of phosphogypsum stack and phosphorus concentrations in the sea until the end of 2015 in order to verify the solidity of insulation wall

At the next phase Yara has planned to start “washing” of soluble

phosphorus from the gypsum area in order to accelerate the reduction of the amount of soluble phosphorus in the gypsum area and thus also the risk of phosphorus leakage to the sea

According to the plan clean water would be pumped to the

Phosphorus discharges at Yara Finland’s Uusikaupunki site

Seppo Knuuttila SYKE

30 October 2014 HELCOM PRESSURE

Ph Phos

phog

ypsu sum stacks stacks in in th the e ca catc tchme hment nt area area of the

Baltic ic Sea Sea

Ph Phos

phog

ypsu sum stacks stacks in in th the e ca catc tchme hment nt area area of the

Baltic ic Sea Sea

88,5 58 50 50 16,6 5,4 2,3 10 20 30 40 50 60 70 80 90 100 Police Poland Fosforit Russia Lifosa Lithuania Yara Siilinjärvi Finland Fosfory Poland Yara Uusikaupunki Finland Yara Landskrona Sweden

Amount of phosphogypsum waste as millions of tons in 2012

Ya Yara ra Fin Finlan land, d, Uu Uusika sikaup upun unki ki site site

in1965

water (common procedure in Europe at that time)

Sea up to 200 tons/year between late 1960s and early 1980s – largest single source of P to the Baltic Sea from Finland

down in 1990

approximately 5 Mt of gypsum including 3800 tons of phosphorus

Wat Water er protecti protection

measu sure res in 19 in 1990 90s

places in bund wall in 1990 (400 m, total length of bund wall is 1000 m)

was covered with moraine (average thickness 30 cm) in 1993

leakage into the sea through the bund wall gradually decreased to 10 kg/d (about 4 tons/year)

Ph Phos

phor

us concentrati concentrations

at th the e se sea a in f in fro ront nt of the

bund nd wall wall

Ad Addit dition ional al mea measu sure res in 20 in 2012 12-2013 2013

permit given to Yara in December 2008 the site was

from the phosphogypsym area as low level as possible

wall in the gypsum bund wall to prevent phosphorus leaking into the Bothnian Sea was given in December 2011

insulation wall was completed in the end of 2013 The aim of additional insulation is to reduce phosphorus leakage by 95 percent from the preceding level (4 tons/year).

Cr Cros

sect ction ion of the

bund wall wall with with ad addit dition ional al insu insulat lation ion

Source: Yara Finland

Additional insulation Bund wall Sea

Monito Monitoring ring site sites s at at th the e se sea a in f in fro ront nt of

th the e bu bund nd wall at wall at Yara’s Uus Uusika ikaup upun unki ki site site

in the sea in front of the bund wall are monitored four times a year at 18 sites locating at 5 meters distance from the bund wall and 4 sites at 20 m and 100 meters distance from the bund wall

through 7 pipes in gypsum area. Surface water level of the insulation ditch between the sea and gypsum area is monitored continuously, water samples are taken weekly

near-by sea area is monitored in 19 sites 8 times a year

Cur Curre rent nt situ situat ation ion

consequence of construction of insulation wall; the target level has not yet been achieved

phosphorus concentrations on both sides of the insulation wall, water balance of phosphogypsum stack and phosphorus concentrations in the sea until the end of 2015 in order to verify the solidity of insulation wall

phosphorus from the gypsum area in order to accelerate the reduction of the amount of soluble phosphorus in the gypsum area and thus also the risk of phosphorus leakage to the sea

gypsum area after which phosphorus containing waters would be collected and phosphorus chemically precipitated and returned to the fertilizer factory